Mitsubishi Electric 800 Series Instruction Manual page 252

 PID control during emergency drive operation
• During emergency drive operation in the PID control mode, the operation is performed under PID control using the Pr.524
setting as a set point. Input the measured values in the method set in Pr.128 or Pr.753.
• When the PID control mode is selected for emergency drive, the PID action during emergency drive operation is as follows
depending on the PID control setting.
Item
Measured value input selection
(Pr.128, Pr.753)
Forward action / reverse action
selection (Pr.128, Pr.753)
Proportional band (Pr.129, Pr.756) Held
Integral time (Pr.130, Pr.757)
Differential time (Pr.134, Pr.758)
Applied to the frequency /
calculation only (Pr.128, Pr.753)
Other PID-related settings
• While the "retry" (Pr.523 = "22[], 32[]") is selected in the PID control mode, if a retry occurs at an occurrence of E.CPU,
E.1 to E.3, E.5 to E.7 during emergency drive operation, the operation is performed not under PID control but with the fixed
frequency. Use Pr.1013 Running speed after emergency drive retry reset to set the fixed frequency.
NOTE
• For details of the PID control, refer to
 Operation of protective functions during emergency drive
• Operation of protective functions during emergency drive is as follows.
Protective Operation during
function emergency drive
E.OC1 Retry
E.OC2 Retry
E.OC3 Retry
E.SCF Output shutoff
E.OV1 Retry
E.OV2 Retry
E.OV3 Retry
E.THT Retry
E.THM Retry
E.FIN Retry
E.IPF Disabled
E.UVT Disabled
E.ILF Disabled
E.OLT Retry
E.SOT Retry
E.LUP Disabled
E.LDN Disabled
E.BE
*1
Retry
E.GF *2
Retry
*1 While the switchover to the commercial power supply operation during emergency drive operation is enabled, when the same protective function
is activated twice consecutively, the retry is attempted up to twice.
*2 When Pr.249 = "2", the output is shut off.
*3 In normal operation (Pr.523 = "200 or 300"), the start signal is turned OFF at the same time the retry function resets the protective function. Input
the start signal again to resume the operation.
Set point / measured value
input setting
Held
Held
Held
Held
Applied to the frequency
Held
page 396.
Protective Operation during
function emergency drive
E.LF Disabled
E.OHT Retry
E.PTC Retry
E.OPT Disabled
E.OP1 Disabled
E.OP2 Disabled
E.OP3 Disabled
E.16 Disabled
E.17 Disabled
E.18 Disabled
E.19 Disabled
E.20 Disabled
E.PE6 Disabled
E.PE Output shutoff
E.PUE Disabled
E.RET Output shutoff
E.PE2 Output shutoff
E.CPU Retry
E.CTE Disabled
PID control action
Deviation input setting
Terminal 4 input
Held
Held
Held
Held
Applied to the frequency
Held
Protective
function
E.P24
E.CDO
E.IOH
E.SER
E.AIE
E.USB
E.SAF
E.PBT
E.OS
E.LCI
E.PCH
E.PID
E.1
E.2
E.3
E.5
E.6
E.7
E.13
5.7 (H) Protective function parameter
Without PID control setting
Terminal 4 input
Reverse action
100% (initial setting)
1 s (initial setting)
Not used (initial setting)
Applied to the frequency
Held
Operation during
emergency drive
Disabled
Retry
Output shutoff
Disabled
Disabled
Disabled
*1
Retry
*1
Retry
Disabled
Disabled
Disabled
Disabled
*3
Retry
*3
Retry
*3
Retry
*3
Retry
*1*3
Retry
*1*3
Retry
Output shutoff
5. PARAMETERS
3
4
5
5
5
6
7
8
9
10
251